Hi All,

Last week I decided to replace the air filters in my 2007 E63 with Mann filters. I tightened one of the screws on passenger side filter box too much and stripped a thread. Today I got a check engine with P2187 code. I am blaming that screw.
How can I fix the box? Should I buy the whole new air filter box assembly, or is there a way to fix that stripped thread?

 

Same thing happend to me, I just took everything apart again and made sure the filter was seated properly and cleared the codes and it hasnt come back.

 

 

Which screw did you strip? Besides the the stripped screw, do you have anything else taken apart or disconnected? P2187 is for Bank 1 (Passenger side) lean. That vehicle has 2 MAF sensors. Could a piece of dirt or debris gotten on the passenger side MAF while changing the filters? If the amount of air restriction (No air filter assembly) is changed while running, this can cause a lean or rich code, The fuel trim adaptions need to be reset after everything is reassembled and installed and the codes are cleared.

 

 

Can you post a photo?

 

I had a stripped screw on the left side of the passenger side side box after I swapped out my filters for AFE filters. I re adjusted them and cleared the codes and it went away. Hasnt come back since.

 

Did you also pull the charcoal filters? They don't really do much and there have been claims of people picking up some power from it.

 

 

 

As long as the cover sits flat against the housing, that in itself should not cause the check engine light and codes. I see many MBZ's with stripped or broken air filter housings, it's kind of a cheap or weak design. The dense foam border of the filter element usually seals fine. After you complete the repair, I would clear the codes, drive the car as you normally do, and see if the same code comes back. If you have access to a scan tool or someone who does, I would copy down the freeze frame data. That way if the same code comes back you have some data to compare it to. Sometimes once is an anomaly, but in this case, twice will confirm a problem. See what happens. Good Luck.

 

 

A generic scan tool can clear codes. Many of them can view freeze frame data. There are many for under $100 (Autel has many). This one on Amazon is a great tool just to keep in your trunk. . Don't get me wrong. It is not ultra sophisticated, but is very user friendly, and will provide you a lot of info. Remember, when you clear codes, you clear the freeze frame data too.

 

You can also clear codes with a cheap OBDII reader and the Torque app. Not the most high tech way of doing it but it's cheap. I think I paid around $5 for the Torque app.

Reader:

 

A quick update. Took the filter box apart today again. There was some debris and a big leaf stuck to the filter right where the sensor is.

Assembled it back and the code is gone. Hope it doesn’t come back. Haven’t used the JB weld product yet.

Thanks for all suggestions.

 

Also while your in there you should also use some MAF cleaner and spray it down and clean it.